Block formed from mirrored pair of sheet-formed tetrahedral units



FIG. 1 is a perspective view of a block formed from mirrored pair ofsheet-formed tetrahedral units, showing my new design;

FIG. 2 is a top view thereof;

FIG. 3 is a bottom view thereof;

FIG. 4 is a front view thereof;

FIG. 5 is a back view thereof;

FIG. 6 is a left side view thereof;

FIG. 7 is a right side view thereof;

FIG. 8 is a perspective view of another embodiment of the block formedfrom mirrored pair of sheet-formed tetrahedral units, showing my newdesign;

FIG. 9 is a top view thereof;

FIG. 10 is a bottom view thereof;

FIG. 11 is a front view thereof;

FIG. 12 is a back view thereof;

FIG. 13 is a left side view thereof; and,

FIG. 14 is a right side view thereof.

CLAIM The ornamental design for an block formed from mirrored pair ofsheet-formed tetrahedral units, as shown and described.